MESON Chess Problem Database

Problem Display
PID: 23071 (8/1Q6/8/3Nk3/7B/3K4/8/8 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

8/1Q6/8/3Nk3/7B/3K4/8/8

#2

4 + 1

5454 Near Snap 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Sc3?
      • 1...Kf4
        • 2.Qe4#
      • 1...Kf5
        • 2.Qe4#
      • 1...Ke6
        • 2.Qd5#
      • 1...Kd6!
    • 1.Se3?
      • 1...Kf4
        • 2.Qe4#
      • 1...Ke6
        • 2.Qd5#
        • 2.Qe7#
      • 1...Kd6!
    • 1.Sb6?
      • 1...Kf4
        • 2.Qe4#
      • 1...Kf5
        • 2.Qe4#
      • 1...Ke6
        • 2.Qd5#
      • 1...Kd6!
    • 1.Sc7?
      • 1...Kf4
        • 2.Qe4#
      • 1...Kf5
        • 2.Qe4#
      • 1...Kd6!
    • 1.Se7?
      • 1...Kf4
        • 2.Qe4#
      • 1...Ke6
        • 2.Qd5#
      • 1...Kd6!
    • 1.Qe7+?
      • 1...Kf5
        • 2.Qe4#
      • 1...Kxd5!
  • Keys
    • 1.Sb4!
      • 1...Kf4
        • 2.Qe4#
      • 1...Kf5
        • 2.Qe4#
      • 1...Kd6
        • 2.Qe7#
      • 1...Ke6
        • 2.Qd5#

Anticipated by 176156(1953)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Vars
        • K(a);S_FLIGHT::QAR1(D)
        • K(a);P-FLIGHT::QAB1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(C);
      • Vars
        • K(a);S_FLIGHT::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(C);
      • Vars
        • K(a);S_FLIGHT::QAR1(D)
        • K(a);P-FLIGHT::QAB1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(C);
      • Vars
        • K(a);S_FLIGHT::QAR1(D)
        • K(a);P-FLIGHT::QAB1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(C);
      • Vars
        • K(a);S_FLIGHT::QAR1(D)
        • K(a);P-FLIGHT::QAB1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAB1(D)
      • Refutation
        • K(a);P-FLIGHT,XS(C)
  • Actual
    • S(C);
    • Vars
      • K(a);S_FLIGHT::QAR1(D)
      • K(a);P-FLIGHT::QAB1(D)
      • K(a);S_FLIGHT::QAB1(D)
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